Home / 18,720.33-25,817.16-12,342.39

Finding the Fourth Proportional to 18,720.33, 25,817.16 and 12,342.39

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Solution

The fourth proportional to 18,720.33, 25,817.16 and 12,342.39 is: 17,021.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.33 : 25,817.16 = 12,342.39 : x
  2. Step 2: Convert to fraction form
    18,720.33/25,817.16 = 12,342.39/x
  3. Step 3: Cross multiply
    18,720.33x = 25,817.16 × 12,342.39
  4. Step 4: Simplify right side
    18,720.33x = 318,645,457.41
  5. Step 5: Solve for x
    x = 318,645,457.41/18,720.33
  6. Step 6: Final answer
    x = 17,021.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.